Hey there I saw your posting in the GardenWeb Hydroponics Forum isn't getting any responses. Here is an alternative forum you can also ask your question at and hopefully you can get an answer to your question. http://hydroponiacs.com/hydroponic-forum/

Here is a link that might be useful: Visit Hydroponic Forum

Just build one. Home depot sells 5x5 white vinyl post covers and end caps. Use 1/2" CPVC for the spray lines, and you'll have a superior product than the Aeroflo.

there is this one chicago CL

http://rockford.craigslist.org/grq/4840714577.html

I agree with cole_Robbie. build it. it took me a day to put one together, and cost about 20 bucks for everything except for the pump. the pump was about 70 bucks, but I think I could have gotten something cheaper. the only tools you need are; a saw, a hole saw, pvc glue and a drill. I also used some zip ties to hold the tubes in place.